PyQt5 QSpinBox – Adding border to the down arrow

In this article we will see how we can add border to the down arrow, we know there exist two buttons up and down in spin box and down arrow is the internal part of the down button. Down arrow is the subset of down button and down button is sub set of spin box. By default there is no border to the down arrow, below is the representation of how border to the down arrow looks like.

In order to do this we have to change the stylesheet code associated with the spin box, below is the stylesheet code

QSpinBox::down-arrow
{
border : 4px solid green;
}

Below is the implementation

# importing libraries
from PyQt5.QtWidgets import *
from PyQt5 import QtCore, QtGui
from PyQt5.QtGui import *
from PyQt5.QtCore import *
import sys


class Window(QMainWindow):

    def __init__(self):
        super().__init__()

        # setting title
        self.setWindowTitle("Python ")

        # setting geometry
        self.setGeometry(100, 100, 600, 400)

        # calling method
        self.UiComponents()

        # showing all the widgets
        self.show()

    # method for widgets
    def UiComponents(self):
        # creating spin box
        self.spin = QSpinBox(self)

        # setting geometry to spin box
        self.spin.setGeometry(100, 100, 250, 60)

        # setting prefix to spin
        self.spin.setPrefix("Prefix ")

        # setting suffix to spin
        self.spin.setSuffix(" Suffix")

        # setting style sheet to the spin box
        # adding border to the down button
        # adding border to the down arrow
        self.spin.setStyleSheet("QSpinBox::down-button"
                                "{"
                                "border : 3px solid pink;"
                                "}"
                                "QSpinBox::down-arrow"
                                "{"
                                "border : 4px solid green;"
                                "}")

# create pyqt5 app
App = QApplication(sys.argv)

# create the instance of our Window
window = Window()

# start the app
sys.exit(App.exec())

Output :